Preheat grill to medium-hot. Tear off 6 pieces of heavy duty foil (each piece needs to be large enough to seal up 1/6 of the vegetables in a foil packet). Spray foil with non-stick cooking spray. On each piece of foil, layer 1/6 of the zucchini slices and then top with 1/6 of the diced tomatoes. Sprinkle 1/6 of seasonings over the vegetables on each foil square. Shape foil into 6 packets and place over medium-hot fire for 20-25 minutes, turning every 10 minutes.
Recipe obtained from CHAR-BROIL Grill Lovers Cookbook, p. 146.